Profile Design Sonic Ergo 35A Aerobar Men's Clothing-Tri-Tops-S/L The inner rim format is

The inner rim format is hooked

Armrest: Ergo / 10mm Pads

as the tire dimension depends on the rim you use

Comes ready with the Shimano joining pin

Profile Design Sonic Ergo 35A Aerobar Men's Clothing-Tri-Tops-S/L The inner rim format isProfile Design's Sonic Ergo 35A aerobars are an excellent solution for triathletes time trialists on a budget. The new Sonic bracket, combined with the Ergo Armrest offer up to 100 distinct positions for an ergonomic and custom fit. Made from aluminium, they are directly compatible with 31. 8 mm road bars. The 35A version is based around a more traditional and forgiving ''ski bend'' shape.